Is there any reason not to apply the patch below, to allow more awkimplementations to be used? After all, it's not like we're going to putnon-ASCII characters into the map file...

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x86: Don't use POSIX character classes in gen-insn-attr-x86.awk

Not all awk implementations (including the default awk in Ubuntu 9.10)support POSIX character classes. Since x86-opcode-map.txt is plainASCII, we can just use explicit ranges for lower case, alphabetic, andalphanumeric characters instead.